#!/usr/bin/perl
# Copyright (C) 2010-2013 Zentyal S.L.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

# Script: restore-logs
#
# This script restores the logs from the backup configured 
#
# Unless is suplied with a date argument it restores from the last backup
#
# If a date argument is supplied, its value must coincide exactly when 
# one of the stored backup. The syntax is:
#
#   --date WeekDay Mont DD HH:MM:SS YYYY (Example: 'Thu Sep 23 14:41:01 2010')
#
# 


use strict;
use warnings;

use EBox;
#use EBox::Config;
use EBox::Global;
#use EBox::Sudo;
use  EBox::EBackup::DBRestore;


use TryCatch;


sub checkDate
{
    my ($ebackup, $date) = @_;
    my $status = $ebackup->remoteStatus();
    my $dateWS = $date;
    $dateWS =~ s/\s+//g;
    foreach my $sta (@{ $status }) {
        my $backupDate = $sta->{date};
        $backupDate =~ s/\s+//g;
        if ($dateWS eq $backupDate) {
            return 1;
        }
    }

    die "Date $date was not founnd among backup dates. The syntax must be the same that the one showed in the module interface";
}

sub lastDate
{
    my ($ebackup) = @_;
    my $status = $ebackup->remoteStatus();
    # get the more recent date
    return $status->[-1]->{date};
}



EBox::init();

my $ebackup = EBox::Global->getInstance(1)->modInstance('ebackup');
unless ($ebackup->isEnabled() ) {
    print "Backup module is disabled\n";
    exit 0;
}
unless ($ebackup->configurationIsComplete()) {
    print "Backup module configuration is not completed. Configure it and retry\n";
    exit 0;

}
unless ($ebackup->lock()) {
     print "There's a backup process taking place";
     exit 1;
}


my $date;
if ($ARGV[0]) {
    if ($ARGV[0] eq '--date') {
        $date = $ARGV[1];
        checkDate($ebackup, $date);
    } else {
        die "Invalid argument: " . $ARGV[0];
    }
} else {
    $date = lastDate($ebackup);
}

# We need an updated cache to avoid errors while checking the status if backup
# files have been re/moved
$ebackup->remoteGenerateStatusCache();



EBox::EBackup::DBRestore::restoreEBoxLogs($date);

exit 0;
